OCLC Online Computer Library Center

OCLC’s Digital Archive – Disseminating with OCLC’s Digital Archive – Disseminating with

METSMETSJay Goodkin

Software Engineer

Digital Collection and Preservation Services

Today’s PresentationOCLC Digital Archive Overview

Dissemination Workflow

OCLC’s METS Implementation for Dissemination

OCLC Digital Archive -

OverviewFunctions include:– Harvest– Ingest– Content Group Management– Rights Group Management– Viewing– Dissemination– Reports– Periodic Audits of Objects in the Archive– Frequent Backups and Disaster Prevention

Dissemination Information Packages based on METS schema

Digital Archive ServicesDigital Archive Services

Discovery ServicesDiscovery Services

Digital Archive RecordContains the Metadata for each Digital Object in the Archive

Extension of Dublin Core

Entered and Maintained using OCLC’s Connexion Service

Starting Point for Most Functions in the Archive

Please see http://www.oclc.org/support/documentation/digitalarchive/da_metadata_elements/ for a detailed description of our metadata elements

DA Record in Connexion

Disseminating an Object

Dissemination OptionsDissemination Options

Original Links – Disseminate Original HTML Pages as Captured from the Web

Relative Links – Disseminate a Locally Viewable Object

Dissemination Dissemination

ConfirmationConfirmation

ReportsReports

Each Object has a List of Associated Reports

Harvest, Ingest and Disseminate Reports shown

Dissemination ReportDissemination Report

Dissemination ManagerDissemination Manager

Inside OCLC’s DIPInside OCLC’s DIPSupports Multiple Objects

Contains all Content Files for each Object

Contains one METS Manifest

Contains all Object-Level METS Documents

WinZIP View of the DIPWinZIP View of the DIP

METS ManifestMETS Manifest

Uses mptr to point to all Object-Level METS Documents included in the DIP

OCLC’s METS ProfileOCLC’s METS ProfileHeader - No extension

Descriptive Metadata Section - OCLC descriptive schema http://digitalarchive.oclc.org/schemas/oclc_dm.xsd

File Section - No extension

Structural Map Section - No extension

Behavior Section - No extension

METS Profile ContinuedMETS Profile ContinuedAdministrative Metadata Section –

MIX schema http://www.loc.gov/standards/mix/mix.xsd

textMD schema http://dlib.nyu.edu/METS/textmd.xsd

OCLC provenance schema http://digitalarchive.oclc.org/schemas/oclc_prov.xsd

METS HeaderMETS Header

References OCLC Extensions

References Industry Standard Extensions – e.g. Mix

METS File GroupMETS File Group

Lists all Content Files for a given Object

Points to Technical/Provenance Metadata for each File

TechMD Mix ExampleTechMD Mix Example

ProvMD Mix ExampleProvMD Mix Example

StructMap ExampleStructMap Example

StructMap & Web StructMap & Web

DocumentsDocumentsFitting Web Documents into div Structure

Issues with representing Links and Offsets

structLink shows which Pages link together but not where the Links occur

Considered using the <par><area> structure

Multi-Object DIPMulti-Object DIP

Multi-Object ManifestMulti-Object Manifest

Issues with Issues with

DisseminationDisseminationInteroperability of OCLC’s DIP

Issues with encoding large Digital Objects into a METS package

Standardization of Extension Schemas Web Documents

Future PlansFuture PlansUse METS to Integrate with other Digital Repositories - CONTENTdm- Olive- DSpace- Etc.

Redesign Digital Archive Storage Layer based on METS

Contacts at OCLC • Please visit our Web site at:

http://www.oclc.org/digitalarchive/

• Contacts:

Pam Kircher – Product Manager

kircherp@oclc.org

Shweta Rani – Software Developer

ranis@oclc.org

Jay Goodkin – Software Developer

goodkinj@oclc.org

Questions • Please see our Tutorial at:

http://www.oclc.org/support/training/digitalarchive/

• Questions?